1991 MITSUBISHI ECLIPSE Service Manual

AUTOMATIC TRANSAXLE - Troubleshooting
2.0L DOHC Turbo Engine (F4A33-W4A33)
P range
100I
1 .*-2 (6.2,
IIII
80I
I27’3 (2.L)3-I
I$3,
3,000
4,000
5,000
6,000Transfer shaft speed
r/min.
IIIIIIIIII11II
coo, ;fi90
100 110 120 130 140 150 160
(:;j (::j (i:, (?, (!;I (ii, (% (56) (62) (68) (75) (81) (87) (93) (99,Vehicle speed km/h (mph)
TFA0572
E range
l-r
1I
I II
II1
I I-IIIIII-80/IL/IIc
3 --4 !D,)
100
:40I1IaI
EI
I
,o
f20IIIII
I2 +- 3 (2.L)3--I, (4D3,11 nnn'1 nnnA nnn!i nnn6.01Idk
I .vvvL,““”L),““”7,““”-,---~, DOTransfer shaft speed
r/min.
IIIIIIIIIIIIIIIII
(E, (69 (:;, (% (4:) (% (% (ii, (ii, (%100 110
120 130 140150 160
(62) (68) (75) (81) (87) (93, (99,Vehicle speed km/h (mph)
TFA0575

21-188AUTOMATIC TRANSAXLE - Troubleshooting
INSPECTION OF ELECTRONIC CONTROL SYSTEM COMPONENTS
Based on the wiring diagram,check whether the continuity and
grounding of each harness is OK.
+
cContinuitvJ.
4
/
.NormalI
1
Improper connection of
connector, damaged or
+ disconnected harness,or incorrect wiring con-
nection.
L
J1
Reconnect the connec-
tor; repair or replace the
harness.
I\
Vary the thermo-sensitive part
uarriageu ur ursconnecreawiring
I/
IReplace the oil-Chanaes of the resistance con-\temoerature sensortinuo& and smooth.4
I 1750446 -Normal,
1: (+) side2:
(-) side
2.0L DOHC TurboEngine
1I
Y3.
Throttle-Check the resistance betweenosition sensorterminals 1 and 4 (1 and 2 forDamaged or discon-
PTPS)SOHC models) of theTPS.netted wiringI
I
TPS termrnal
2.0L Engine
1. power
7FUO5352. output3. -4. ground
1.8L Engine
1. power
2. ground
3. output
+
(3.5-6.5 S2/2O”C (68°F)1Check the resistance between
terminals 4 and 2 (2 and 3 forSOHC models) with the engine
idling after throttle-valve opening
warm-up.
4
Resistance: approx. 0.4 kilohml
20°C (68°F)I
Improper adjustment
J
’Readjust the TPS in-
stallation.Check for changes of the resist-
ance between terminals 4 and 2
(for SOHC between terminals 3
and 2 when the throttle valve is
operated from the idling position
to the fully open position.
4Changes of the resistance con-
tinuous and smooth.
4
Normal

AUTOMATIC TRANSAXLE - Troubleshooting21-189
_ 4, ppBgeneratorCheck the resistance betweenterminals 1 and 2 or 3 and 4.Short-circuit; or
dam-aged or disconnectedwiring
:
I
.
4
/
NormalI
1750338II\
Pulse generator terminals.(215-275 Q/2O”C (68°F)1
5. PulseeneratorConnect the pulse generator and
A or B?checkingwbody harness, and connect an
+ mm narillroscilloscooe. Check with the\
I
#, -mm v3nlwdP
scope)I \
chassis on a dynamo or with thefront wheels raised.
With the selector lever at the “L”
position and the engine running at
1,000 rpm, check the voltagewaveform between terminals 1
and 2.
Oscilloscope waveform
1,8L, 2.0L DOHCNon-Turbo Engine
Noise
/AA_--
iw
5E4
1,000 mVp-p or higher>
171091
2.0L DOHC Turbo Engine
,Noise
Replace the pulse
generator.
. . .,’
Incorrect installation of
the pulse generator, or
malfunction,of the pulsegenerator.
II
Improper grounding of
the pulse generator cir-cuit’s shielded wiring.
i
Replace the pulse
generator.+
(500 mVp-p or higherJ
Noise
Normal1
+,I
Correct the installation
condition, or replace the /pulse generator.

21490AUTOMATIC TRANSAXLE - Troubleshooting6.
Pressure-Check the resistance between
terminal 1 of the solenoid valve
connector and the transaxle case.Short-circuit, or’@, ,,n-
1:aged or disconnectedwiring1
Solenoid valve
connector terminalsConnect
12V between the trans-
axle case and terminal 2;
switch ON and OFF and check for
operation noise.” ,“,
Foreign material caught
between the valve andguide1 .
1:
PCSV
2: DCCSV
3: SCSV-A4:
scsv-B
7. Shift-control
solenoid valve
(SCSV) A or Bt
Check the resistance between
terminal 3 or 4 of the solenoid
valve connector and the transaxle
case.t
4
c-22.3 f l.5Q/20°C (68°F)J
I
Replace the PCSV.
I
Short-circuit, or dam-+
aged or disconnectedwiring4
Replace the SCSV..Connect
12V between the trans-axle case and terminal 3 or 4;
switch ON and OFF and check for
operation noise of the solenoid
valve, and check the valve stroke.
~~~~~
4Noise exists.
I
NormalIa
/

AUTOMATIC TRANSAXLE - TroubleshootingSet the selector lever to “P” or“N”, and start the engine.
IWith the engine idling,
de-
Dress the footbrake firmlv.I
( Let the engine continue idling. )
NormalImproper adjustment
of idling
I

21-192AUTOMATIC TRANSAXLE - Troubleshooting
9. Damper clutchcontrol solenoid
valve (DCCSV)
1,8L, 2.0L DOHC
Non-Turbo
Engine
Solenoid valve
connector terminals1:
PCSV2: DCCSV
3: SCSV-A4:
SCSV-B
1750338Check the resistance between
terminal 2 of the solenoid valve
connector and the transmission
case.too low or too
G’Short-circuit
0,s” dam-
aged or d&connectedwiring
.: ’
I
(Standard value: 3 Q/20%)I
INormalI*Sticking *Sticking
is isusually at the usually at the
release side. release side.
1 Replace the DCCSV. 1
171096
b adjust if necessary.
Replace the acceleratorswitch.
(No continuity (resistance: Q)))4
Normal

AUTOMATIC TRANSAXLE - Troubleshootingtinuity between terminals 3 and 4
Continuity exists
In the “R” range, check for con-tinuity between terminals 4 and 7,
and terminals 10 and 11.
+Continuity exists
7Continuity exists
In the “D” range, check for con-
tinuity between terminals 4 and 6.
Continuity exists
1
In the “2” range, check for con-tinuity between terminals 1 and 4.
Continuitv exists
In the “L” range, check for con-tinuity between terminals 4 and 5.
< ‘.
p$g the inhibitor1
?’.
4Continuity exists
4
Normal
i

21-194AUTOMATIC TRANSAXLE - TroubleshootingCheck for continuity between the
kickdown servo switch terminal
TFA0389Start the engine, set to the “L”Continuity exists
+
range, and let the engine idle;check for continuity between the
kickdown servo switch terminaland the transaxle case.
NOTE: Be sure the brakes are
applied during this check.
+No continuity
“‘
Poor contact (sticking)
4
Replace the K/D servoswitch.
.
+
Normal
Disconnect the harness (both A
and B connectors) from the vehi-
Malfunction of the ori-
ginal TCU
Consider the original TCU to be
Same problem (as before TCU
exchange) occurs.